Complete a puzzle in less than 1 minute

Achievement Guide for Speed Demon

Achievement won on 26 Jun 14TA Score for this game: 239
Posted on 26 June 14 at 13:49

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You might be able to do this legit, but most mere mortals would have a hard time. The easiest way is to press "Show Guides" on the left, which highlights all of the spaces that a number can go. So press that, press a number and figure it out quickly. You should be able to solve any puzzle in well under a minute, even on Expert.